<?php
echo "<h2>PHP 很有趣!</h2>";
echo "我要学 PHP!<br>";
echo "这是一个", "字符串，", "使用了", "多个", "参数。";



  if ($password != $repassword) {
        $repasswordErr = "请再次填写密码";
      } else {
        $repassword = test_input($_POST['repassword']);
        if (strlen($password) < 6 || strlen($repassword) < 6) {
          echo '<script>alert("密码长度不少于6个");history.go(-1);</script>';
        } else {
          $password = test_input($_POST['password']);
        }
      }
